Method of automatically controlling opening and closing of window of drivers cab or working vehicle and apparatus for practicing the method

摘要

A method of automatically controlling the opening and closing of a driver's cab of a working vehicle, and an apparatus for practicing the same method which are capable of carrying out the opening and closing of such a window smoothly and the shutting of such a window reliably, and having a high operability and a high safety. To obtain such effects, the apparatus is provided with a window (14) movable along guide rails (20L, 20R, 22L, 22R) extending between a window frame and a top wall, a driving cable (28) for moving the window (14) vertically by operating a driving means (34), locking units (29L, 29R) adapted to press the window against a window frame of a driver's cab and shut up the same, and a controller (50) for controlling these operations. In this apparatus, the locking units (29L, 29R) are provided with means (47L, 47R) for detecting a terminal position for a downward movement of the window during a window closing operation, a circuit for detecting a locking motor driving current during a window shutting operation, and means (48L, 48R) for detecting limit positions for backward movements of locking members during a window shutting force releasing operation; and the controller (50) is provided with a delay circuit (59), an element (54) for eliminating slack in the driving cable, an element for shutting up the window (14), and a window shutting force releasing to element (52). IMAGE